MX record without an A record

Discussion in 'DNS Server' started by Simon Geary, Nov 24, 2005.

  1. Simon Geary

    Simon Geary Guest

    Hi all,

    The domain I am working on is bntb.bm. We have three MX records, two of
    which point to mail1.bntb.bm and mail2.bntb.bm. The third record points to
    our ISP.

    We have no A records for either the mail1 or mail2 addresses. Instead,
    mail1.bntb.bm has an NS record that points to a completely different FQDN
    and it is this in turn that has an A record. So the zone might look a bit
    like this:

    bntb.bm MX mail1.bntb.bm 10
    bntb.bm MX mail2.bntb.bm 15
    mail1.bntb.bm NS firewall.bntb.bm
    mail2.bntb.bm NS firewall.bntb.bm
    firewall.bntb.bm A 192.168.0.1

    Email is mostly working fine, but does this sound like a problem
    configuration? From what I have read this is not RFC compliant as the MX
    record does not have a corresponding A record but should I even care about
    this? I am thinking it might be more efficient to point the MX records
    directly to firewall.bntb.bm, any opinions?
     
    Simon Geary, Nov 24, 2005
    #1
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  2. MX records must have A records or your A record for your domain name must
    point to the mail server IP.

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    Kevin D. Goodknecht Sr. [MVP], Nov 25, 2005
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